TechSpan

TechSpan® is a state of the art,
three hinged precast concrete arch system. It is used for bridge
and waterway applications. They provide all the benefits of precast
concrete structures plus a number of advantages over typical culvert, bridge
and arch systems.

TechSpan® is an ideal structure
for placement over waterways and environmentally sensitive creeks.

TechSpan® provides the ideal solution for short to medium span bridging
with precast concrete segments that offer rapid and safe installation,
without the need for scaffolding. TechSpan® provides a long service
life structure with superior seismic qualities and low maintenance requirements.

This 10 m span arch was designed,
priced, and delivered to site under a fast-tracked timing schedule.
These precast walls are over 20 m high.

Advanced design procedures and fabrication capabilities allow for the use
of arch structures in high-load applications not suitable for standardized
systems. Simple, rapid, predictable construction with a small crew and
conventional equipment is therefore achievable.

Each TechSpan® structure
is custom-designed to provide strong, safe and reliable performance.

State-of-the-art design methods accurately define the radius of curvature
of the arch to minimize tensile stresses. Unique precasting methods produce
structures that conform to any and all geometric design parameters. Economical
use of concrete and reinforcing steel provides maximum safety at the lowest
possible cost.
Unlike any other precast arch system, each TechSpan® structure is
specifically designed-structurally and geometrically for the particular
application. RECo engineers use a custom finite element analysis program
and funicular curve theory to define the optimum radius of curvature for
an arch based on the project specific span length, soil coverage and construction
sequencing requirements. This design produces the most efficient and economical
sections in arching.

Speed of installation with TechSpan® greatly reduces the over all
costs. Typically during construction, there is no need to divert activity
such as road traffic, streams, or rail traffic from under the span. A
small work crew with a crane has typically erected 10 to 20 metres of TechSpan®
per day.

The proof of the effectiveness of TechSpan® is successful experience:
since 1998 over 730,000 square metres of custom designed TechSpan®
structures have been placed in service for highways, railroads, industry,
and other uses in the world.